Cerres, I am new memeber this week and am working my way from end of post towards the beginning regarding Hemi prob's. Was informed 2 weeks ago from a non-dodge mech. that 5.7L's should have used 5W-20 oil instead of the Owner's Manual posted 5W-30 to 10W-30. NEED TO KNOW how you came about this data. Thanks, PolarSnake 03 Hemi.